Did Planet X / Niburu collide with Earth and form the Moon?
More and more evidence is pointing to the Earth having a collision with another large object while the Earth was still a cooling molten body. This collision may actually have torn off a chunk which was captured into orbit and became what we know as our Moon. However, there has never been any evidence to suggest this large object was another planet, nor that it was on any kind of recurring cycle with Earth. Some point to the asteroid belt and claim that it is the remnants of this planet, but scientists have proven that the asteroids that make up the belt could never have been a planet due to the lack of material in the belt. If you gathered all the asteroids in the belt together, they would form a body only half the size of the Moon.
